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Unformatted text preview: 3/18/11 Physics 122 1 3/18/11 Physics 122 2 y = A sin( kx1
y = A sin( 1 3/14/11 t ) + A sin( kx2
t ) + A sin( 2
t) Physics 122 x1 x2 3 a D
When D = n ,
When D = (n+1/2) ,
3/29/10 Physics 122 4 3/16/11 Physics 122 5 At the correct angle,
the light from each
We get N2 times
of a single slit.
3/18/11 Physics 122 6 3/16/11 Physics 122 7 When the distance
traveled by the wavelet
from the middle of the slit
is half a wavelength greater
than the distance traveled
by the wavelet from the
top of the slit
every wavelet from
the top half of the slit
has a canceling wavelet
from the bottom half
of the slit. d d/2
3/16/11 Physics 122 The result is no intensity
at that angle. 8 D=0 D = /2 D= d/2
3/16/11 Physics 122 9 3/18/11 Physics 122 10 When the angular separation
between points is greater than
the angle to the first diffraction
minimum, the points can be
This is called
The minimum of a
diffraction pattern occurs
at an angle 3/18/11 Physics 122 11 The separation of the dots is about 0.25 cm.
The diameter of the pupil of the eye is ~0.25 cm.
How far do you have to stand for the dots to blend?
3/18/11 Physics 122 12 http://www.folksemantic.com/visits/71765
3/18/11 Physics 122 13 3/18/11 Physics 122 16 ...
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This note was uploaded on 12/28/2011 for the course PHYSICS 122 taught by Professor Bhagat during the Fall '11 term at Maryland.
- Fall '11